Peter Gutowski was born in Smolary, near Gołańcz, Poland, and died in Michigan. Marianna "Mary" Kendzierski was born in Dębłowo, near Gniezno, Poland, and died in Detroit, Michigan. They married in Manistee, Michigan, in 1899.

1910, 958 Palmer St., Detroit, Michigan; Peter, Mary, and five children in the household; Peter's occupation is laborer at an auto factory.

1920, 96 Holborn Ave., Detroit, Michigan; Mary, three children, and two lodgers in the household; Mary's occupation is housekeeper at a hospital. (Detroit city directories indicate the family had lived at this address since 1911.)